268 



INDEX. 



Meliltea. 154, zio. 



Membrana intermedia, 16. 



liienophyllum, Z45. 



Merteusia, 255. 



Meritlijia, 208. 



Mfrulimctte, 208, 257, 



Mesenteries, of Actinuzoa, ijz — 4, 137, 



146, 172. 

 Metagenesis, 74. 

 Metamori>lK)sis, 73. 

 , Metastnca, 247. 

 Michelinia, 2j8. 

 Micrabacia, 247. 

 Micropyle, of animal ovum, 71. 

 Micrusulcna, 246. 

 Millepora, 259. 



MilL'po)id(C, 205, 206 2]7, 244, 247. 

 Mini/as, i6j. 

 MiEa?i(/fastrcea, 246. 

 Mceandrina, 142, 187. 199, 203,252, 239. 

 Monoecious forms, of llydroxoa, 50, 



112: of Actinozoa, 169, 2:9. 

 Montlivaultia, 239. 

 Nopst-a, 154, 210. 241. 

 Mouth, ot Hydrozoa, 29, 86, 88; of 



Actinozoa, 131, 141 ; ot Clenophora, 



218. 

 Movements, of Hydrozoa, 23, 27, 36; 



of Actinozoa, 138, 162, 210; of t'/i.- 



noph.na, 229. 

 Mucous layer, of l)lastoderm, 16. 

 Mulberry-mass, 16. 

 Muscular syst m, of Hydrozoa, 36: 



of Actinozoa, 162. 

 Mycetophijllia, 240. 

 Myriotheia, 82, 87. 



Nectocalyces, 27, 36, 70 ; of Calyro- 



phorid(B, 96—9 ; of fliysoptiorid^L, 



107; ol Medusid(E, 116. 

 Nectocalycine canals, 37. 

 Nectosac, 36. 



Nematophores, of Sertularidts, 34, 93. 

 Nemop.sis, 84. 

 Nervous system, of Medusfdce, 39 ; of 



Actinia, 166 ; of Clenophora, 167. 

 Neural region, 17. 

 Nutritive organs, of Hydrozoa, 28 ; o! 



Actinozoa, 141. 



Oceania turrila, marginal bodies of, 



38. 

 Oceanidev, 119. 

 Ocelli, 38. 

 Oculinn, 240. 



OculinidcE , 203, 207, 237, 246, 247. 

 Ocyroc, 234. 

 Olilhaniia;, 130. 

 Omphynia, 144 

 Operculum, of Cainpanularia fasti- 



giata, 92. 

 • Oral canals, of Clenophora, 220. 

 Order, of sipta. 175. 

 Orders, of Hydrozoa, 79 j of Aciino- 



Zja, 196. 



Organ-pipe Corals, 209. 



Oroseris, 239. 



Otolites, 39. 



Outer layer, of blastoderm. 16. 



Ova, of animals, 14, 71 ; oi Hydrozoa, 



50; oi Actinozoa, 169. 

 Ovaria, of Hydrozoa, 40, 50; of .<i/c- 



tinozoa, 169. 

 Ovigerous vesicles, of Sertularidie,^^. 



Pachygyra, 239. 



Packypliylluni. 244. 



Pali, 155. 



PaliEocyclus, 244. 



Palpocils, 95. 



Palylboa, 141. 



Puracyntlius, 240. 



Paragastric caisals, of Clenophora, 

 14s, 2iO. 



Parasitic forms, of Hydrozoa, 61, 83 ; 

 oi Actinozoa, 198, 2^3. 



Parasmilia, 246. 



Parietal gemmation, of /fc/mo2oa, 183. 



Partlienogenesis, 745 theory of, 78. 



Pavo)iaria, 240. 



Peachia, 142, 199, 200. 



Pedicle, of tentacle in Hydrozoa, 33. 



Peduncle, of polypite. 29, 31. 



Pelagia, structure of, 40, 123 ; de- 

 velopment of, 68 ; phosphoroscencci 

 of, 129. 



Pelagidce, 125. 



Pennaria, 87—9. 



Pennatu/a, ziz — ';, 232. 



Pennatididce, 163, 186,210—3,214,235, 

 237, 246, 247. 



Peniacccuia, 246. 



Peplusmilin, 246. 



Perforata, 158, 161, 203, 206, 237, 242. 



Perigonimvs, 87 - 9. 



Periplast, 10. 



Peristomial space, 132, 198. 



Permian Corals, 245. 



I'hanerocarpae, 120. 



Phillipsastrcea, 238. 



Philomedusa, 142, 233. 



Phosphorescence, of Ccelenterata, 7 ; 

 of Hydrozoa, 128 ; of Pcnnatulidce, 

 212 : < f Clenophora, 2}0. 



Phyllactis, 200. 



Phyllangia, 24 ii 



Phijlloccenia, 240. 



Phyllocyst, 36. 



Phyo^emmaria, of Velella, 105. 



P/iysalia, thread-cells ot, 5 ; villi of, 

 31; tentacles of, 32, 33, in; dovelop- 

 mi-nt of, 58 ; pneumatophore of, 

 101, 107; gonophores of, in, 112; 

 distribution of, 127. 



Physaliadcs, 114. 



Physical elements, relations to, of 

 Hydrozoa, 126; of Actinozoa, 231. 



Physoplwra. 102. 107 — 12. 



Physophoriadcs, 113. 



Piiysophvridce, general characters of. 



